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Finding the Fourth Proportional to 68,028.74, 101,939.16 and 28,564.28

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Solution

The fourth proportional to 68,028.74, 101,939.16 and 28,564.28 is: 42,802.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,028.74 : 101,939.16 = 28,564.28 : x
  2. Step 2: Convert to fraction form
    68,028.74/101,939.16 = 28,564.28/x
  3. Step 3: Cross multiply
    68,028.74x = 101,939.16 × 28,564.28
  4. Step 4: Simplify right side
    68,028.74x = 2,911,818,709.20
  5. Step 5: Solve for x
    x = 2,911,818,709.20/68,028.74
  6. Step 6: Final answer
    x = 42,802.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.